Postoperative astigmatism after central vs eccentric penetrating keratoplasties |
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| Authors: | G van Rij F M Cornell G O Waring L A Wilson W H Beekhuis |
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| Affiliation: | 1. Department of Ophthalmology, Emory University, Atlanta, Georgia;2. Department of Ophthalmology, Erasmus University Eye Hospital, Rotterdam, The Netherlands;1. Cornea Division, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland;2. School of Public Health, Department of Biostatistics, Johns Hopkins University, Baltimore, Maryland;1. Department of Ophthalmology, Baylor College of Medicine, Houston, Texas;2. Department of Ophthalmology and Pediatrics, Texas Children''s Hospital and Baylor College of Medicine, Houston, Texas;1. Retina Consultants of Arizona, Phoenix, Arizona;2. USC Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, California;3. Center for Retina and Macular Disease, Winter Haven, Florida;4. University of Central Florida, Orlando, Florida;5. Hackensack University Medical Center, Hackensack, New Jersey;6. NJ Retina, Ridgewood, New Jersey;7. ThromboGenics NV, Leuven, Belgium;1. School of Medicine, University of Queensland, Herston, Brisbane, QLD 4072, Australia;2. Department of Neurology, Princess Alexandra Hospital, Brisbane, QLD, Australia;3. Department of Neurology, Royal Brisbane and Women’s Hospital, Brisbane, QLD, Australia;4. Princess Alexandra Hospital, Brisbane, QLD, Australia;1. Neurology and Clinical Neurophysiology, University Hospital Augsburg, Augsburg, Germany;2. Diagnostic and Interventional Neuroradiology, University Hospital Augsburg, Augsburg, Germany;3. Department of Haematology and Oncology, Interdisciplinary Cancer Center Augsburg, University Hospital Augsburg, Augsburg, Germany |
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| Abstract: | Six patients with markedly eccentric penetrating keratoplasties had severe corneal astigmatism (mean, 10.38 +/- 2.91 diopters). In four of these patients the flat meridian was lying in the direction of graft displacement. Laboratory experiments disclosed no statistically significant difference in diameter between the major and minor axes of the corneal buttons in the centrally and eccentrically trephined eyes and we could not elucidate the mechanism of the severe astigmatism. However, in the eccentrically trephined eyes the longer axis consistently lay in the direction of decentration whereas in the centrally trephined eyes the long axis was oriented randomly. |
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